John thomson



(No Model.)

J. THOMSON. FORM OF DISK FOR OSOILLATING DISK ACTIONS.

Patented May 19,1891.-

UNITED STATES PATENT OFFICE.

JOHN THOMSON, OF BROOKLYN, ASSIGNOR TO THE THOMSON METER COMPANY, OF NEWYORK, N. Y.

FORM OF DISK FOR OSCILLATING-DISK ACTIONS.

SPECIFICATION forrning part of Letters Patent No. 452,487, dated May 19,1891.

Application filed January 3 1891. serial No, 376,662. (No model J To allwhom iii may concern.-

Be it known that I, J OHN THOMSON, a citizen of the United States,residing at Brooklyn, Kings county, New York, have invented certain newand useful Improvements in Form of Disk for Oscillating-Disk Actions, ofwhich the following is a specification.

This invention relates to oscillating-disk actions; and it consists inconstructing the disk as fully set forth hereinafter and illustrated inthe drawings, in which Figure 1 is a central transverse section throughcasings, such as might be employed in a water-meter, exposing the diskin full lines edge View, showing my improvement. Fig. 2 is a top planview of the disk, and Fig. 3 is a transverse center section on the lineof the slot. Fig. 4 is a modification, showing the invention inconnection with the disk when it is cup-shaped or conical.

Description of the invention may be embodied in the single statementthat the disk 5 from center to circumference, in transverse section, isWedge-shaped, the thicker portion 6 being toward the center, the thinner7 at the periphery. The objects of this form are vantage in requiringless quantity of material to construct the disk, but also in a givensize of chamber-such as illustrated-gives a greater displacement foreach oscillation. An additional advantage of controlling importance isthat the periphery of the disk, the portion traveling at highest speed,is relieved of weight, and hence the disk may be operated more rapidlywith less destructive shock and vibration than in the forms heretoforeemployed. The disk may be 1 of differentcross-sectional forms, providedthe thickness is reduced toward the edge.

Without limiting myself to the precise construction and arrangement ofparts shown and described, I claim 1. The combination, in anoscillating-disk action, of a casing, disk, and central ball, the disktapering toward the edge, substantially as described.

2. A disk for oscillating-disk actions, provided with acentral ball andreduced in thickness at the edge, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHN THOMSON. Witnesses:

FRANK LAMBERT, EDWD. K. ANDERTON.

